A track nonlinear energy sink with restricted motion for rotor systems

Dou, Jinxin; Yao, Hui Ming; Li, Hui; Li, Jianlei; Jia, Rongguang

doi:10.1016/j.ijmecsci.2023.108631

Cited by 18 publications

(1 citation statement)

References 75 publications

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“…Therefore, permanent magnets can be used to generate nonlinear forces [51] . Dou et al [52] found that the nonlinear stiffness of TNESs mainly came from the shape coefficient of the track, and the nonlinearity of the restoring force could be enhanced by permanent magnets. The above studies prove that eliminating linear stiffness improves the vibration damping performance of NESs.…”

Section: Introductionmentioning

confidence: 99%

A vertical track nonlinear energy sink

Li,

Ding

2024

Appl. Math. Mech.-Engl. Ed.

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Eliminating the effects of gravity and designing nonlinear energy sinks (NESs) that suppress vibration in the vertical direction is a challenging task with numerous damping requirements. In this paper, the dynamic design of a vertical track nonlinear energy sink (VTNES) with zero linear stiffness in the vertical direction is proposed and realized for the first time. The motion differential equations of the VTNES coupled with a linear oscillator (LO) are established. With the strong nonlinearity considered of the VTNES, the steady-state response of the system is analyzed with the harmonic balance method (HBM), and the accuracy of the HBM is verified numerically. On this basis, the VTNES prototype is manufactured, and its nonlinear stiffness is identified. The damping effect and dynamic characteristics of the VTNES are studied theoretically and experimentally. The results show that the VTNES has better damping effects when strong modulation responses (SMRs) occur. Moreover, even for small-amplitude vibration, the VTNES also has a good vibration suppression effect. To sum up, in order to suppress the vertical vibration, an NES is designed and developed, which can suppress the vertical vibration within certain ranges of the resonance frequency and the vibration intensity.

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Section: Introductionmentioning

confidence: 99%